Question: Alternate energy
With the soaring cost of energy and deregulation of the U.S. electrical power grid, alternate sources of power generation such as photovoltaic and fuel cell technology is on the increase. Does UL List this type of equipment?
UL currently Lists these types of alternative power sources and generation equipment Distributed Generation equipment includes but is not necessarily limited to photovoltaics, fuel cells, engine generator sets, and microturbines. The inverters or converters used to control grid interconnection are also considered to be DG equipment.
UL Lists DG equipment under the following categories: Gas and Fuel Power Systems- Engine Generators (FTSR), Fuel Gas Booster Compressor Equipment (IUXX), Stationary Fuel Cell Power Plants (IRGX), Fuel Cell Equipment (IRGN); Photovoltaic Power Systems Equipment- AC Modules (QHWJ), Charge Controllers (QIBP), Modules and Panels (QIGU), Power Systems Accessories (QIIO), Power Units (QIJL) and Inverters, Converters and Controllers for use in Independent Power Systems (QIKH); and Wind Power Systems- Wind Turbine Generating Systems, Small (ZGYW), Large (ZGYZ) and Subassemblies (ZGZJ).
A list of Distributed Power Generation Equipment categories is located on page XVII, in the front of the 2001 General Information for Electrical Equipment Directory (White Book). You can monitor the development of new product categories for these new technologies by accessing the Alternative Power Generation Equipment page on the Regulators page of the UL website at www.UL.com/regulators. Just click on Alternative Power Generation Equipment.
Question: Sealing compounds
Are there sealing compounds such as expanding foam, that have been Listed as a means to keep moisture or condensation from entering equipment through service conduit or the condensation between a refrigeration unit and the outside?
There currently are no Listings for expandable foams or other compounds that have been investigated for contact with conductor insulation or their ability to seal out condensation or moisture from conduits or equipment.